"use client";

import { useState } from "react";
import { Button } from "@/components/ui/button";
import {
  Bell,
  X,
  CheckCircle,
  AlertCircle,
  Info,
  Calendar,
  Clock,
} from "lucide-react";
import { cn } from "@/lib/utils";
import { useAppTheme } from "@/components/ThemeProvider";

export interface Notification {
  id: string;
  type: "success" | "warning" | "info" | "appointment";
  title: string;
  message: string;
  time: string;
  read: boolean;
}

interface NotificationsProps {
  notifications: Notification[];
  onMarkAsRead?: (id: string) => void;
  onDismiss?: (id: string) => void;
  onMarkAllAsRead?: () => void;
}

export function Notifications({
  notifications,
  onMarkAsRead,
  onDismiss,
  onMarkAllAsRead,
}: NotificationsProps) {
  const unreadCount = notifications.filter((n) => !n.read).length;
  const { theme } = useAppTheme();
  const isDark = theme === "dark";

  const getIcon = (type: Notification["type"]) => {
    switch (type) {
      case "success":
        return <CheckCircle className={`w-5 h-5 ${isDark ? "text-green-300" : "text-green-600"}`} />;
      case "warning":
        return <AlertCircle className={`w-5 h-5 ${isDark ? "text-orange-300" : "text-orange-600"}`} />;
      case "info":
        return <Info className={`w-5 h-5 ${isDark ? "text-blue-300" : "text-blue-600"}`} />;
      case "appointment":
        return <Calendar className={`w-5 h-5 ${isDark ? "text-rose-300" : "text-rose-600"}`} />;
    }
  };

  const getBgColor = (type: Notification["type"]) => {
    switch (type) {
      case "success":
        return isDark ? "bg-green-500/10 border-green-500/30" : "bg-[#4A90A4]/10 border-[#4A90A4]/30";
      case "warning":
        return isDark ? "bg-rose-500/10 border-rose-400/40" : "bg-rose-100 border-rose-300";
      case "info":
        return isDark ? "bg-pink-500/10 border-pink-400/40" : "bg-pink-50 border-pink-200";
      case "appointment":
        return isDark ? "bg-rose-500/10 border-rose-400/40" : "bg-gradient-to-br from-rose-50 to-pink-50 border-rose-300";
    }
  };

  return (
    <div className="w-full max-w-2xl mx-auto">
      {/* Header */}
      <div className="flex items-center justify-between mb-6">
        <div className="flex items-center gap-3">
          <Bell className={`w-6 h-6 ${isDark ? "text-white" : "text-gray-900"}`} />
          <h2 className={`text-2xl font-bold ${isDark ? "text-white" : "text-gray-900"}`}>Notifications</h2>
          {unreadCount > 0 && (
            <span className="px-2.5 py-0.5 bg-linear-to-r from-rose-500 to-pink-500 text-white text-sm font-medium rounded-full">
              {unreadCount}
            </span>
          )}
        </div>
        {unreadCount > 0 && onMarkAllAsRead && (
          <Button
            variant="outline"
            size="sm"
            onClick={onMarkAllAsRead}
            className={isDark ? "border-gray-700 text-gray-200 hover:bg-gray-800" : ""}
          >
            Mark all as read
          </Button>
        )}
      </div>

      {/* Notifications List */}
      <div className="space-y-3">
        {notifications.length === 0 ? (
          <div className="text-center py-12">
            <Bell className={`w-12 h-12 mx-auto mb-4 ${isDark ? "text-gray-600" : "text-gray-400"}`} />
            <p className={isDark ? "text-gray-400" : "text-gray-600"}>No notifications</p>
          </div>
        ) : (
          notifications.map((notification) => (
            <div
              key={notification.id}
              className={cn(
                "p-4 rounded-lg border-2 transition-all",
                getBgColor(notification.type),
                !notification.read && (isDark ? "ring-2 ring-offset-2 ring-rose-400 ring-offset-gray-900" : "ring-2 ring-offset-2 ring-rose-300")
              )}
            >
              <div className="flex items-start gap-3">
                <div className="mt-0.5">{getIcon(notification.type)}</div>
                <div className="flex-1">
                  <div className="flex items-start justify-between gap-4">
                    <div className="flex-1">
                      <h3
                        className={cn(
                          "font-semibold mb-1",
                            !notification.read
                              ? isDark ? "text-white" : "text-gray-900"
                              : isDark ? "text-gray-300" : "text-gray-700"
                        )}
                      >
                        {notification.title}
                      </h3>
                        <p className={`text-sm mb-2 ${isDark ? "text-gray-400" : "text-gray-600"}`}>{notification.message}</p>
                        <div className={`flex items-center gap-2 text-xs ${isDark ? "text-gray-500" : "text-gray-500"}`}>
                        <Clock className="w-3 h-3" />
                        {notification.time}
                      </div>
                    </div>
                    <div className="flex items-center gap-2">
                      {!notification.read && onMarkAsRead && (
                        <Button
                          variant="ghost"
                          size="icon-sm"
                          onClick={() => onMarkAsRead(notification.id)}
                            className={`h-7 w-7 ${isDark ? "text-gray-300 hover:bg-gray-800" : ""}`}
                        >
                          <CheckCircle className="w-4 h-4" />
                        </Button>
                      )}
                      {onDismiss && (
                        <Button
                          variant="ghost"
                          size="icon-sm"
                          onClick={() => onDismiss(notification.id)}
                            className={`h-7 w-7 ${isDark ? "text-gray-300 hover:bg-gray-800" : ""}`}
                        >
                          <X className="w-4 h-4" />
                        </Button>
                      )}
                    </div>
                  </div>
                </div>
              </div>
            </div>
          ))
        )}
      </div>
    </div>
  );
}

// Notification Bell Component for Header
export function NotificationBell({
  count,
  onClick,
}: {
  count: number;
  onClick: () => void;
}) {
  return (
    <Button variant="ghost" size="icon" className="relative" onClick={onClick}>
      <Bell className="w-5 h-5" />
      {count > 0 && (
        <span className="absolute -top-1 -right-1 w-5 h-5 bg-red-500 text-white text-xs rounded-full flex items-center justify-center font-medium">
          {count > 9 ? "9+" : count}
        </span>
      )}
    </Button>
  );
}